这些模块包括振铃检测模块、来电过滤模块、双音多频解码模块、语音提示模块和单片机控制驱动模块。

These modules include the ring detection module, call filtering module, dual-tone multi-frequency decoder modules, voice prompt module and microprocessor controlled driver module.

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详细论述多频互控方式的信令信号传送，交换机DTMF信令无线信道接续与控制。

We study the transmission of signaling signal with the compelled method of multi-frequency, and study the switching control of DTMF signaling with exchange in wireless in details.

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研究了利用同步控制器解决周期多频采样系统的干扰解耦问题。

We address the disturbance decoupling problem of periodic and multirate discrete time systems via synchronous controllers.

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